1 /*
2 * Copyright (c) 1998-2003, 2010 Proofpoint, Inc. and its suppliers.
3 * All rights reserved.
4 * Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved.
5 * Copyright (c) 1988, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * By using this file, you agree to the terms and conditions set
9 * forth in the LICENSE file which can be found at the top level of
10 * the sendmail distribution.
11 *
12 */
13
14 #include <sendmail.h>
15
16 SM_RCSID("@(#)$Id: err.c,v 8.206 2013-11-22 20:51:55 ca Exp $")
17
18 #if LDAPMAP
19 # include <lber.h>
20 # include <ldap.h> /* for LDAP error codes */
21 #endif /* LDAPMAP */
22
23 static void putoutmsg __P((char *, bool, bool));
24 static void puterrmsg __P((char *));
25 static char *fmtmsg __P((char *, const char *, const char *, const char *,
26 int, const char *, va_list));
27
28 /*
29 ** FATAL_ERROR -- handle a fatal exception
30 **
31 ** This function is installed as the default exception handler
32 ** in the main sendmail process, and in all child processes
33 ** that we create. Its job is to handle exceptions that are not
34 ** handled at a lower level.
35 **
36 ** The theory is that unhandled exceptions will be 'fatal' class
37 ** exceptions (with an "F:" prefix), such as the out-of-memory
38 ** exception "F:sm.heap". As such, they are handled by exiting
39 ** the process in exactly the same way that xalloc() in Sendmail 8.10
40 ** exits the process when it fails due to lack of memory:
41 ** we call syserr with a message beginning with "!".
42 **
43 ** Parameters:
44 ** exc -- exception which is terminating this process
45 **
46 ** Returns:
47 ** none
48 */
49
50 void
fatal_error(exc)51 fatal_error(exc)
52 SM_EXC_T *exc;
53 {
54 static char buf[256];
55 SM_FILE_T f;
56
57 /*
58 ** This function may be called when the heap is exhausted.
59 ** The following code writes the message for 'exc' into our
60 ** static buffer without allocating memory or raising exceptions.
61 */
62
63 sm_strio_init(&f, buf, sizeof(buf));
64 sm_exc_write(exc, &f);
65 (void) sm_io_flush(&f, SM_TIME_DEFAULT);
66
67 /*
68 ** Terminate the process after logging an error and cleaning up.
69 ** Problems:
70 ** - syserr decides what class of error this is by looking at errno.
71 ** That's no good; we should look at the exc structure.
72 ** - The cleanup code should be moved out of syserr
73 ** and into individual exception handlers
74 ** that are part of the module they clean up after.
75 */
76
77 errno = ENOMEM;
78 syserr("!%s", buf);
79 }
80
81 /*
82 ** SYSERR -- Print error message.
83 **
84 ** Prints an error message via sm_io_printf to the diagnostic output.
85 **
86 ** If the first character of the syserr message is `!' it will
87 ** log this as an ALERT message and exit immediately. This can
88 ** leave queue files in an indeterminate state, so it should not
89 ** be used lightly.
90 **
91 ** If the first character of the syserr message is '!' or '@'
92 ** then syserr knows that the process is about to be terminated,
93 ** so the SMTP reply code defaults to 421. Otherwise, the
94 ** reply code defaults to 451 or 554, depending on errno.
95 **
96 ** Parameters:
97 ** fmt -- the format string. An optional '!', '@', or '+',
98 ** followed by an optional three-digit SMTP
99 ** reply code, followed by message text.
100 ** (others) -- parameters
101 **
102 ** Returns:
103 ** none
104 ** Raises E:mta.quickabort if QuickAbort is set.
105 **
106 ** Side Effects:
107 ** increments Errors.
108 ** sets ExitStat.
109 */
110
111 char MsgBuf[BUFSIZ*2]; /* text of most recent message */
112 static char HeldMessageBuf[sizeof(MsgBuf)]; /* for held messages */
113
114 #if NAMED_BIND && !defined(NO_DATA)
115 # define NO_DATA NO_ADDRESS
116 #endif /* NAMED_BIND && !defined(NO_DATA) */
117
118 void
119 /*VARARGS1*/
120 #ifdef __STDC__
syserr(const char * fmt,...)121 syserr(const char *fmt, ...)
122 #else /* __STDC__ */
123 syserr(fmt, va_alist)
124 const char *fmt;
125 va_dcl
126 #endif /* __STDC__ */
127 {
128 register char *p;
129 int save_errno = errno;
130 bool panic, exiting, keep;
131 char *user;
132 char *enhsc;
133 char *errtxt;
134 struct passwd *pw;
135 char ubuf[80];
136 SM_VA_LOCAL_DECL
137
138 panic = exiting = keep = false;
139 switch (*fmt)
140 {
141 case '!':
142 ++fmt;
143 panic = exiting = true;
144 break;
145 case '@':
146 ++fmt;
147 exiting = true;
148 break;
149 case '+':
150 ++fmt;
151 keep = true;
152 break;
153 default:
154 break;
155 }
156
157 /* format and output the error message */
158 if (exiting)
159 {
160 /*
161 ** Since we are terminating the process,
162 ** we are aborting the entire SMTP session,
163 ** rather than just the current transaction.
164 */
165
166 p = "421";
167 enhsc = "4.0.0";
168 }
169 else if (save_errno == 0)
170 {
171 p = "554";
172 enhsc = "5.0.0";
173 }
174 else
175 {
176 p = "451";
177 enhsc = "4.0.0";
178 }
179 SM_VA_START(ap, fmt);
180 errtxt = fmtmsg(MsgBuf, (char *) NULL, p, enhsc, save_errno, fmt, ap);
181 SM_VA_END(ap);
182 puterrmsg(MsgBuf);
183
184 /* save this message for mailq printing */
185 if (!panic && CurEnv != NULL && (!keep || CurEnv->e_message == NULL))
186 {
187 char *nmsg = sm_rpool_strdup_x(CurEnv->e_rpool, errtxt);
188
189 if (CurEnv->e_rpool == NULL && CurEnv->e_message != NULL)
190 sm_free(CurEnv->e_message);
191 CurEnv->e_message = nmsg;
192 }
193
194 /* determine exit status if not already set */
195 if (ExitStat == EX_OK)
196 {
197 if (save_errno == 0)
198 ExitStat = EX_SOFTWARE;
199 else
200 ExitStat = EX_OSERR;
201 if (tTd(54, 1))
202 sm_dprintf("syserr: ExitStat = %d\n", ExitStat);
203 }
204
205 pw = sm_getpwuid(RealUid);
206 if (pw != NULL)
207 user = pw->pw_name;
208 else
209 {
210 user = ubuf;
211 (void) sm_snprintf(ubuf, sizeof(ubuf), "UID%d", (int) RealUid);
212 }
213
214 if (LogLevel > 0)
215 sm_syslog(panic ? LOG_ALERT : LOG_CRIT,
216 CurEnv == NULL ? NOQID : CurEnv->e_id,
217 "SYSERR(%s): %.900s",
218 user, errtxt);
219 switch (save_errno)
220 {
221 case EBADF:
222 case ENFILE:
223 case EMFILE:
224 case ENOTTY:
225 #ifdef EFBIG
226 case EFBIG:
227 #endif /* EFBIG */
228 #ifdef ESPIPE
229 case ESPIPE:
230 #endif /* ESPIPE */
231 #ifdef EPIPE
232 case EPIPE:
233 #endif /* EPIPE */
234 #ifdef ENOBUFS
235 case ENOBUFS:
236 #endif /* ENOBUFS */
237 #ifdef ESTALE
238 case ESTALE:
239 #endif /* ESTALE */
240 printopenfds(true);
241 mci_dump_all(smioout, true);
242 break;
243 }
244 if (panic)
245 {
246 #if XLA
247 xla_all_end();
248 #endif /* XLA */
249 sync_queue_time();
250 if (tTd(0, 1))
251 abort();
252 exit(EX_OSERR);
253 }
254 errno = 0;
255 if (QuickAbort)
256 sm_exc_raisenew_x(&EtypeQuickAbort, 2);
257 }
258 /*
259 ** USRERR -- Signal user error.
260 **
261 ** This is much like syserr except it is for user errors.
262 **
263 ** Parameters:
264 ** fmt -- the format string. If it does not begin with
265 ** a three-digit SMTP reply code, 550 is assumed.
266 ** (others) -- sm_io_printf strings
267 **
268 ** Returns:
269 ** none
270 ** Raises E:mta.quickabort if QuickAbort is set.
271 **
272 ** Side Effects:
273 ** increments Errors.
274 */
275
276 /*VARARGS1*/
277 void
278 #ifdef __STDC__
usrerr(const char * fmt,...)279 usrerr(const char *fmt, ...)
280 #else /* __STDC__ */
281 usrerr(fmt, va_alist)
282 const char *fmt;
283 va_dcl
284 #endif /* __STDC__ */
285 {
286 char *enhsc;
287 char *errtxt;
288 SM_VA_LOCAL_DECL
289
290 if (fmt[0] == '5' || fmt[0] == '6')
291 enhsc = "5.0.0";
292 else if (fmt[0] == '4' || fmt[0] == '8')
293 enhsc = "4.0.0";
294 else if (fmt[0] == '2')
295 enhsc = "2.0.0";
296 else
297 enhsc = NULL;
298 SM_VA_START(ap, fmt);
299 errtxt = fmtmsg(MsgBuf, CurEnv->e_to, "550", enhsc, 0, fmt, ap);
300 SM_VA_END(ap);
301
302 if (SuprErrs)
303 return;
304
305 /* save this message for mailq printing */
306 switch (MsgBuf[0])
307 {
308 case '4':
309 case '8':
310 if (CurEnv->e_message != NULL)
311 break;
312
313 /* FALLTHROUGH */
314
315 case '5':
316 case '6':
317 if (CurEnv->e_rpool == NULL && CurEnv->e_message != NULL)
318 sm_free(CurEnv->e_message);
319 if (MsgBuf[0] == '6')
320 {
321 char buf[MAXLINE];
322
323 (void) sm_snprintf(buf, sizeof(buf),
324 "Postmaster warning: %.*s",
325 (int) sizeof(buf) - 22, errtxt);
326 CurEnv->e_message =
327 sm_rpool_strdup_x(CurEnv->e_rpool, buf);
328 }
329 else
330 {
331 CurEnv->e_message =
332 sm_rpool_strdup_x(CurEnv->e_rpool, errtxt);
333 }
334 break;
335 }
336
337 puterrmsg(MsgBuf);
338 if (LogLevel > 3 && LogUsrErrs)
339 sm_syslog(LOG_NOTICE, CurEnv->e_id, "%.900s", errtxt);
340 if (QuickAbort)
341 sm_exc_raisenew_x(&EtypeQuickAbort, 1);
342 }
343 /*
344 ** USRERRENH -- Signal user error.
345 **
346 ** Same as usrerr but with enhanced status code.
347 **
348 ** Parameters:
349 ** enhsc -- the enhanced status code.
350 ** fmt -- the format string. If it does not begin with
351 ** a three-digit SMTP reply code, 550 is assumed.
352 ** (others) -- sm_io_printf strings
353 **
354 ** Returns:
355 ** none
356 ** Raises E:mta.quickabort if QuickAbort is set.
357 **
358 ** Side Effects:
359 ** increments Errors.
360 */
361
362 /*VARARGS2*/
363 void
364 #ifdef __STDC__
usrerrenh(char * enhsc,const char * fmt,...)365 usrerrenh(char *enhsc, const char *fmt, ...)
366 #else /* __STDC__ */
367 usrerrenh(enhsc, fmt, va_alist)
368 char *enhsc;
369 const char *fmt;
370 va_dcl
371 #endif /* __STDC__ */
372 {
373 char *errtxt;
374 SM_VA_LOCAL_DECL
375
376 if (enhsc == NULL || *enhsc == '\0')
377 {
378 if (fmt[0] == '5' || fmt[0] == '6')
379 enhsc = "5.0.0";
380 else if (fmt[0] == '4' || fmt[0] == '8')
381 enhsc = "4.0.0";
382 else if (fmt[0] == '2')
383 enhsc = "2.0.0";
384 }
385 SM_VA_START(ap, fmt);
386 errtxt = fmtmsg(MsgBuf, CurEnv->e_to, "550", enhsc, 0, fmt, ap);
387 SM_VA_END(ap);
388
389 if (SuprErrs)
390 return;
391
392 /* save this message for mailq printing */
393 switch (MsgBuf[0])
394 {
395 case '4':
396 case '8':
397 if (CurEnv->e_message != NULL)
398 break;
399
400 /* FALLTHROUGH */
401
402 case '5':
403 case '6':
404 if (CurEnv->e_rpool == NULL && CurEnv->e_message != NULL)
405 sm_free(CurEnv->e_message);
406 if (MsgBuf[0] == '6')
407 {
408 char buf[MAXLINE];
409
410 (void) sm_snprintf(buf, sizeof(buf),
411 "Postmaster warning: %.*s",
412 (int) sizeof(buf) - 22, errtxt);
413 CurEnv->e_message =
414 sm_rpool_strdup_x(CurEnv->e_rpool, buf);
415 }
416 else
417 {
418 CurEnv->e_message =
419 sm_rpool_strdup_x(CurEnv->e_rpool, errtxt);
420 }
421 break;
422 }
423
424 puterrmsg(MsgBuf);
425 if (LogLevel > 3 && LogUsrErrs)
426 sm_syslog(LOG_NOTICE, CurEnv->e_id, "%.900s", errtxt);
427 if (QuickAbort)
428 sm_exc_raisenew_x(&EtypeQuickAbort, 1);
429 }
430
431 /*
432 ** MESSAGE -- print message (not necessarily an error)
433 **
434 ** Parameters:
435 ** msg -- the message (sm_io_printf fmt) -- it can begin with
436 ** an SMTP reply code. If not, 050 is assumed.
437 ** (others) -- sm_io_printf arguments
438 **
439 ** Returns:
440 ** none
441 **
442 ** Side Effects:
443 ** none.
444 */
445
446 /*VARARGS1*/
447 void
448 #ifdef __STDC__
message(const char * msg,...)449 message(const char *msg, ...)
450 #else /* __STDC__ */
451 message(msg, va_alist)
452 const char *msg;
453 va_dcl
454 #endif /* __STDC__ */
455 {
456 char *errtxt;
457 SM_VA_LOCAL_DECL
458
459 errno = 0;
460 SM_VA_START(ap, msg);
461 errtxt = fmtmsg(MsgBuf, CurEnv->e_to, "050", (char *) NULL, 0, msg, ap);
462 SM_VA_END(ap);
463 putoutmsg(MsgBuf, false, false);
464
465 /* save this message for mailq printing */
466 switch (MsgBuf[0])
467 {
468 case '4':
469 case '8':
470 if (CurEnv->e_message != NULL)
471 break;
472 /* FALLTHROUGH */
473
474 case '5':
475 if (CurEnv->e_rpool == NULL && CurEnv->e_message != NULL)
476 sm_free(CurEnv->e_message);
477 CurEnv->e_message = sm_rpool_strdup_x(CurEnv->e_rpool, errtxt);
478 break;
479 }
480 }
481
482 #if _FFR_PROXY
483 /*
484 ** EMESSAGE -- print message (not necessarily an error)
485 ** (same as message() but requires reply code and enhanced status code)
486 **
487 ** Parameters:
488 ** replycode -- SMTP reply code.
489 ** enhsc -- enhanced status code.
490 ** msg -- the message (sm_io_printf fmt) -- it can begin with
491 ** an SMTP reply code. If not, 050 is assumed.
492 ** (others) -- sm_io_printf arguments
493 **
494 ** Returns:
495 ** none
496 **
497 ** Side Effects:
498 ** none.
499 */
500
501 /*VARARGS3*/
502 void
503 # ifdef __STDC__
emessage(const char * replycode,const char * enhsc,const char * msg,...)504 emessage(const char *replycode, const char *enhsc, const char *msg, ...)
505 # else /* __STDC__ */
506 emessage(replycode, enhsc, msg, va_alist)
507 const char *replycode;
508 const char *enhsc;
509 const char *msg;
510 va_dcl
511 # endif /* __STDC__ */
512 {
513 char *errtxt;
514 SM_VA_LOCAL_DECL
515
516 errno = 0;
517 SM_VA_START(ap, msg);
518 errtxt = fmtmsg(MsgBuf, CurEnv->e_to, replycode, enhsc, 0, msg, ap);
519 SM_VA_END(ap);
520 putoutmsg(MsgBuf, false, false);
521
522 /* save this message for mailq printing */
523 switch (MsgBuf[0])
524 {
525 case '4':
526 case '8':
527 if (CurEnv->e_message != NULL)
528 break;
529 /* FALLTHROUGH */
530
531 case '5':
532 if (CurEnv->e_rpool == NULL && CurEnv->e_message != NULL)
533 sm_free(CurEnv->e_message);
534 CurEnv->e_message = sm_rpool_strdup_x(CurEnv->e_rpool, errtxt);
535 break;
536 }
537 }
538
539 /*
540 ** EXTSC -- check and extract a status codes
541 **
542 ** Parameters:
543 ** msg -- string with possible enhanced status code.
544 ** delim -- delim for enhanced status code.
545 ** replycode -- pointer to storage for SMTP reply code;
546 ** must be != NULL and have space for at least
547 ** 4 characters.
548 ** enhsc -- pointer to storage for enhanced status code;
549 ** must be != NULL and have space for at least
550 ** 10 characters ([245].[0-9]{1,3}.[0-9]{1,3})
551 **
552 ** Returns:
553 ** -1 -- no SMTP reply code.
554 ** >=3 -- offset of error text in msg.
555 ** (<=4 -- no enhanced status code)
556 */
557
558 int
extsc(msg,delim,replycode,enhsc)559 extsc(msg, delim, replycode, enhsc)
560 const char *msg;
561 int delim;
562 char *replycode;
563 char *enhsc;
564 {
565 int offset;
566
567 SM_REQUIRE(replycode != NULL);
568 SM_REQUIRE(enhsc != NULL);
569 replycode[0] = '\0';
570 enhsc[0] = '\0';
571 if (msg == NULL)
572 return -1;
573 if (!ISSMTPREPLY(msg))
574 return -1;
575 sm_strlcpy(replycode, msg, 4);
576 if (msg[3] == '\0')
577 return 3;
578 offset = 4;
579 if (isenhsc(msg + 4, delim))
580 offset = extenhsc(msg + 4, delim, enhsc) + 4;
581 return offset;
582 }
583 #endif /* _FFR_PROXY */
584
585 /*
586 ** NMESSAGE -- print message (not necessarily an error)
587 **
588 ** Just like "message" except it never puts the to... tag on.
589 **
590 ** Parameters:
591 ** msg -- the message (sm_io_printf fmt) -- if it begins
592 ** with a three digit SMTP reply code, that is used,
593 ** otherwise 050 is assumed.
594 ** (others) -- sm_io_printf arguments
595 **
596 ** Returns:
597 ** none
598 **
599 ** Side Effects:
600 ** none.
601 */
602
603 /*VARARGS1*/
604 void
605 #ifdef __STDC__
nmessage(const char * msg,...)606 nmessage(const char *msg, ...)
607 #else /* __STDC__ */
608 nmessage(msg, va_alist)
609 const char *msg;
610 va_dcl
611 #endif /* __STDC__ */
612 {
613 char *errtxt;
614 SM_VA_LOCAL_DECL
615
616 errno = 0;
617 SM_VA_START(ap, msg);
618 errtxt = fmtmsg(MsgBuf, (char *) NULL, "050",
619 (char *) NULL, 0, msg, ap);
620 SM_VA_END(ap);
621 putoutmsg(MsgBuf, false, false);
622
623 /* save this message for mailq printing */
624 switch (MsgBuf[0])
625 {
626 case '4':
627 case '8':
628 if (CurEnv->e_message != NULL)
629 break;
630 /* FALLTHROUGH */
631
632 case '5':
633 if (CurEnv->e_rpool == NULL && CurEnv->e_message != NULL)
634 sm_free(CurEnv->e_message);
635 CurEnv->e_message = sm_rpool_strdup_x(CurEnv->e_rpool, errtxt);
636 break;
637 }
638 }
639 /*
640 ** PUTOUTMSG -- output error message to transcript and channel
641 **
642 ** Parameters:
643 ** msg -- message to output (in SMTP format).
644 ** holdmsg -- if true, don't output a copy of the message to
645 ** our output channel.
646 ** heldmsg -- if true, this is a previously held message;
647 ** don't log it to the transcript file.
648 **
649 ** Returns:
650 ** none.
651 **
652 ** Side Effects:
653 ** Outputs msg to the transcript.
654 ** If appropriate, outputs it to the channel.
655 ** Deletes SMTP reply code number as appropriate.
656 */
657
658 static void
putoutmsg(msg,holdmsg,heldmsg)659 putoutmsg(msg, holdmsg, heldmsg)
660 char *msg;
661 bool holdmsg;
662 bool heldmsg;
663 {
664 char msgcode = msg[0];
665 char *errtxt = msg;
666 char *id;
667
668 /* display for debugging */
669 if (tTd(54, 8))
670 sm_dprintf("--- %s%s%s\n", msg, holdmsg ? " (hold)" : "",
671 heldmsg ? " (held)" : "");
672
673 /* map warnings to something SMTP can handle */
674 if (msgcode == '6')
675 msg[0] = '5';
676 else if (msgcode == '8')
677 msg[0] = '4';
678 id = (CurEnv != NULL) ? CurEnv->e_id : NULL;
679
680 /* output to transcript if serious */
681 if (!heldmsg && CurEnv != NULL && CurEnv->e_xfp != NULL &&
682 strchr("45", msg[0]) != NULL)
683 (void) sm_io_fprintf(CurEnv->e_xfp, SM_TIME_DEFAULT, "%s\n",
684 msg);
685
686 if (LogLevel > 14 && (OpMode == MD_SMTP || OpMode == MD_DAEMON))
687 sm_syslog(LOG_INFO, id,
688 "--- %s%s%s", msg, holdmsg ? " (hold)" : "",
689 heldmsg ? " (held)" : "");
690
691 if (msgcode == '8')
692 msg[0] = '0';
693
694 /* output to channel if appropriate */
695 if (!Verbose && msg[0] == '0')
696 return;
697 if (holdmsg)
698 {
699 /* save for possible future display */
700 msg[0] = msgcode;
701 if (HeldMessageBuf[0] == '5' && msgcode == '4')
702 return;
703 (void) sm_strlcpy(HeldMessageBuf, msg, sizeof(HeldMessageBuf));
704 return;
705 }
706
707 (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
708
709 if (OutChannel == NULL)
710 return;
711
712 /* find actual text of error (after SMTP status codes) */
713 if (ISSMTPREPLY(errtxt))
714 {
715 int l;
716
717 errtxt += 4;
718 l = isenhsc(errtxt, ' ');
719 if (l <= 0)
720 l = isenhsc(errtxt, '\0');
721 if (l > 0)
722 errtxt += l + 1;
723 }
724
725 /* if DisConnected, OutChannel now points to the transcript */
726 if (!DisConnected &&
727 (OpMode == MD_SMTP || OpMode == MD_DAEMON || OpMode == MD_ARPAFTP))
728 (void) sm_io_fprintf(OutChannel, SM_TIME_DEFAULT, "%s\r\n",
729 msg);
730 else
731 (void) sm_io_fprintf(OutChannel, SM_TIME_DEFAULT, "%s\n",
732 errtxt);
733 if (TrafficLogFile != NULL)
734 (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT,
735 "%05d >>> %s\n", (int) CurrentPid,
736 (OpMode == MD_SMTP || OpMode == MD_DAEMON)
737 ? msg : errtxt);
738 #if !PIPELINING
739 /* XXX can't flush here for SMTP pipelining */
740 if (msg[3] == ' ')
741 (void) sm_io_flush(OutChannel, SM_TIME_DEFAULT);
742 if (!sm_io_error(OutChannel) || DisConnected)
743 return;
744
745 /*
746 ** Error on output -- if reporting lost channel, just ignore it.
747 ** Also, ignore errors from QUIT response (221 message) -- some
748 ** rude servers don't read result.
749 */
750
751 if (InChannel == NULL || sm_io_eof(InChannel) ||
752 sm_io_error(InChannel) || strncmp(msg, "221", 3) == 0)
753 return;
754
755 /* can't call syserr, 'cause we are using MsgBuf */
756 HoldErrs = true;
757 if (LogLevel > 0)
758 sm_syslog(LOG_CRIT, id,
759 "SYSERR: putoutmsg (%s): error on output channel sending \"%s\": %s",
760 CURHOSTNAME,
761 shortenstring(msg, MAXSHORTSTR), sm_errstring(errno));
762 #endif /* !PIPELINING */
763 }
764 /*
765 ** PUTERRMSG -- like putoutmsg, but does special processing for error messages
766 **
767 ** Parameters:
768 ** msg -- the message to output.
769 **
770 ** Returns:
771 ** none.
772 **
773 ** Side Effects:
774 ** Sets the fatal error bit in the envelope as appropriate.
775 */
776
777 static void
puterrmsg(msg)778 puterrmsg(msg)
779 char *msg;
780 {
781 char msgcode = msg[0];
782
783 /* output the message as usual */
784 putoutmsg(msg, HoldErrs, false);
785
786 /* be careful about multiple error messages */
787 if (OnlyOneError)
788 HoldErrs = true;
789
790 /* signal the error */
791 Errors++;
792
793 if (CurEnv == NULL)
794 return;
795
796 if (msgcode == '6')
797 {
798 /* notify the postmaster */
799 CurEnv->e_flags |= EF_PM_NOTIFY;
800 }
801 else if (msgcode == '5' && bitset(EF_GLOBALERRS, CurEnv->e_flags))
802 {
803 /* mark long-term fatal errors */
804 CurEnv->e_flags |= EF_FATALERRS;
805 }
806 }
807 /*
808 ** ISENHSC -- check whether a string contains an enhanced status code
809 **
810 ** Parameters:
811 ** s -- string with possible enhanced status code.
812 ** delim -- delim for enhanced status code.
813 **
814 ** Returns:
815 ** 0 -- no enhanced status code.
816 ** >4 -- length of enhanced status code.
817 **
818 ** Side Effects:
819 ** none.
820 */
821 int
isenhsc(s,delim)822 isenhsc(s, delim)
823 const char *s;
824 int delim;
825 {
826 int l, h;
827
828 if (s == NULL)
829 return 0;
830 if (!((*s == '2' || *s == '4' || *s == '5') && s[1] == '.'))
831 return 0;
832 h = 0;
833 l = 2;
834 while (h < 3 && isascii(s[l + h]) && isdigit(s[l + h]))
835 ++h;
836 if (h == 0 || s[l + h] != '.')
837 return 0;
838 l += h + 1;
839 h = 0;
840 while (h < 3 && isascii(s[l + h]) && isdigit(s[l + h]))
841 ++h;
842 if (h == 0 || s[l + h] != delim)
843 return 0;
844 return l + h;
845 }
846 /*
847 ** EXTENHSC -- check and extract an enhanced status code
848 **
849 ** Parameters:
850 ** s -- string with possible enhanced status code.
851 ** delim -- delim for enhanced status code.
852 ** e -- pointer to storage for enhanced status code.
853 ** must be != NULL and have space for at least
854 ** 10 characters ([245].[0-9]{1,3}.[0-9]{1,3})
855 **
856 ** Returns:
857 ** 0 -- no enhanced status code.
858 ** >4 -- length of enhanced status code.
859 **
860 ** Side Effects:
861 ** fills e with enhanced status code.
862 */
863
864 int
extenhsc(s,delim,e)865 extenhsc(s, delim, e)
866 const char *s;
867 int delim;
868 char *e;
869 {
870 int l, h;
871
872 if (s == NULL)
873 return 0;
874 if (!((*s == '2' || *s == '4' || *s == '5') && s[1] == '.'))
875 return 0;
876 h = 0;
877 l = 2;
878 e[0] = s[0];
879 e[1] = '.';
880 while (h < 3 && isascii(s[l + h]) && isdigit(s[l + h]))
881 {
882 e[l + h] = s[l + h];
883 ++h;
884 }
885 if (h == 0 || s[l + h] != '.')
886 return 0;
887 e[l + h] = '.';
888 l += h + 1;
889 h = 0;
890 while (h < 3 && isascii(s[l + h]) && isdigit(s[l + h]))
891 {
892 e[l + h] = s[l + h];
893 ++h;
894 }
895 if (h == 0 || s[l + h] != delim)
896 return 0;
897 e[l + h] = '\0';
898 return l + h;
899 }
900 /*
901 ** FMTMSG -- format a message into buffer.
902 **
903 ** Parameters:
904 ** eb -- error buffer to get result -- MUST BE MsgBuf.
905 ** to -- the recipient tag for this message.
906 ** num -- default three digit SMTP reply code.
907 ** enhsc -- enhanced status code.
908 ** en -- the error number to display.
909 ** fmt -- format of string.
910 ** ap -- arguments for fmt.
911 **
912 ** Returns:
913 ** pointer to error text beyond status codes.
914 **
915 ** Side Effects:
916 ** none.
917 */
918
919 static char *
fmtmsg(eb,to,num,enhsc,eno,fmt,ap)920 fmtmsg(eb, to, num, enhsc, eno, fmt, ap)
921 register char *eb;
922 const char *to;
923 const char *num;
924 const char *enhsc;
925 int eno;
926 const char *fmt;
927 SM_VA_LOCAL_DECL
928 {
929 char del;
930 int l;
931 int spaceleft = sizeof(MsgBuf);
932 char *errtxt;
933
934 /* output the reply code */
935 if (ISSMTPCODE(fmt))
936 {
937 num = fmt;
938 fmt += 4;
939 }
940 if (num[3] == '-')
941 del = '-';
942 else
943 del = ' ';
944 if (SoftBounce && num[0] == '5')
945 {
946 /* replace 5 by 4 */
947 (void) sm_snprintf(eb, spaceleft, "4%2.2s%c", num + 1, del);
948 }
949 else
950 (void) sm_snprintf(eb, spaceleft, "%3.3s%c", num, del);
951 eb += 4;
952 spaceleft -= 4;
953
954 if ((l = isenhsc(fmt, ' ' )) > 0 && l < spaceleft - 4)
955 {
956 /* copy enh.status code including trailing blank */
957 l++;
958 (void) sm_strlcpy(eb, fmt, l + 1);
959 eb += l;
960 spaceleft -= l;
961 fmt += l;
962 }
963 else if ((l = isenhsc(enhsc, '\0')) > 0 && l < spaceleft - 4)
964 {
965 /* copy enh.status code */
966 (void) sm_strlcpy(eb, enhsc, l + 1);
967 eb[l] = ' ';
968 eb[++l] = '\0';
969 eb += l;
970 spaceleft -= l;
971 }
972 if (SoftBounce && eb[-l] == '5')
973 {
974 /* replace 5 by 4 */
975 eb[-l] = '4';
976 }
977 errtxt = eb;
978
979 /* output the file name and line number */
980 if (FileName != NULL)
981 {
982 (void) sm_snprintf(eb, spaceleft, "%s: line %d: ",
983 shortenstring(FileName, 83), LineNumber);
984 eb += (l = strlen(eb));
985 spaceleft -= l;
986 }
987
988 /*
989 ** output the "to" address only if it is defined and one of the
990 ** following codes is used:
991 ** 050 internal notices, e.g., alias expansion
992 ** 250 Ok
993 ** 252 Cannot VRFY user, but will accept message and attempt delivery
994 ** 450 Requested mail action not taken: mailbox unavailable
995 ** 550 Requested action not taken: mailbox unavailable
996 ** 553 Requested action not taken: mailbox name not allowed
997 **
998 ** Notice: this still isn't "the right thing", this code shouldn't
999 ** (indirectly) depend on CurEnv->e_to.
1000 */
1001
1002 if (to != NULL && to[0] != '\0' &&
1003 (strncmp(num, "050", 3) == 0 ||
1004 strncmp(num, "250", 3) == 0 ||
1005 strncmp(num, "252", 3) == 0 ||
1006 strncmp(num, "450", 3) == 0 ||
1007 strncmp(num, "550", 3) == 0 ||
1008 strncmp(num, "553", 3) == 0))
1009 {
1010 (void) sm_strlcpyn(eb, spaceleft, 2,
1011 shortenstring(to, MAXSHORTSTR), "... ");
1012 spaceleft -= strlen(eb);
1013 while (*eb != '\0')
1014 *eb++ &= 0177;
1015 }
1016
1017 /* output the message */
1018 (void) sm_vsnprintf(eb, spaceleft, fmt, ap);
1019 spaceleft -= strlen(eb);
1020 while (*eb != '\0')
1021 *eb++ &= 0177;
1022
1023 /* output the error code, if any */
1024 if (eno != 0)
1025 (void) sm_strlcpyn(eb, spaceleft, 2, ": ", sm_errstring(eno));
1026
1027 return errtxt;
1028 }
1029 /*
1030 ** BUFFER_ERRORS -- arrange to buffer future error messages
1031 **
1032 ** Parameters:
1033 ** none
1034 **
1035 ** Returns:
1036 ** none.
1037 */
1038
1039 void
buffer_errors()1040 buffer_errors()
1041 {
1042 HeldMessageBuf[0] = '\0';
1043 HoldErrs = true;
1044 }
1045 /*
1046 ** FLUSH_ERRORS -- flush the held error message buffer
1047 **
1048 ** Parameters:
1049 ** print -- if set, print the message, otherwise just
1050 ** delete it.
1051 **
1052 ** Returns:
1053 ** none.
1054 */
1055
1056 void
flush_errors(print)1057 flush_errors(print)
1058 bool print;
1059 {
1060 if (print && HeldMessageBuf[0] != '\0')
1061 putoutmsg(HeldMessageBuf, false, true);
1062 HeldMessageBuf[0] = '\0';
1063 HoldErrs = false;
1064 }
1065 /*
1066 ** SM_ERRSTRING -- return string description of error code
1067 **
1068 ** Parameters:
1069 ** errnum -- the error number to translate
1070 **
1071 ** Returns:
1072 ** A string description of errnum.
1073 **
1074 ** Side Effects:
1075 ** none.
1076 */
1077
1078 const char *
sm_errstring(errnum)1079 sm_errstring(errnum)
1080 int errnum;
1081 {
1082 char *dnsmsg;
1083 char *bp;
1084 static char buf[MAXLINE];
1085 #if HASSTRERROR
1086 char *err;
1087 char errbuf[30];
1088 #endif /* HASSTRERROR */
1089 #if !HASSTRERROR && !defined(ERRLIST_PREDEFINED)
1090 extern char *sys_errlist[];
1091 extern int sys_nerr;
1092 #endif /* !HASSTRERROR && !defined(ERRLIST_PREDEFINED) */
1093
1094 /*
1095 ** Handle special network error codes.
1096 **
1097 ** These are 4.2/4.3bsd specific; they should be in daemon.c.
1098 */
1099
1100 dnsmsg = NULL;
1101 switch (errnum)
1102 {
1103 case ETIMEDOUT:
1104 case ECONNRESET:
1105 bp = buf;
1106 #if HASSTRERROR
1107 err = strerror(errnum);
1108 if (err == NULL)
1109 {
1110 (void) sm_snprintf(errbuf, sizeof(errbuf),
1111 "Error %d", errnum);
1112 err = errbuf;
1113 }
1114 (void) sm_strlcpy(bp, err, SPACELEFT(buf, bp));
1115 #else /* HASSTRERROR */
1116 if (errnum >= 0 && errnum < sys_nerr)
1117 (void) sm_strlcpy(bp, sys_errlist[errnum],
1118 SPACELEFT(buf, bp));
1119 else
1120 (void) sm_snprintf(bp, SPACELEFT(buf, bp),
1121 "Error %d", errnum);
1122 #endif /* HASSTRERROR */
1123 bp += strlen(bp);
1124 if (CurHostName != NULL)
1125 {
1126 if (errnum == ETIMEDOUT)
1127 {
1128 (void) sm_snprintf(bp, SPACELEFT(buf, bp),
1129 " with ");
1130 bp += strlen(bp);
1131 }
1132 else
1133 {
1134 bp = buf;
1135 (void) sm_snprintf(bp, SPACELEFT(buf, bp),
1136 "Connection reset by ");
1137 bp += strlen(bp);
1138 }
1139 (void) sm_strlcpy(bp,
1140 shortenstring(CurHostName, MAXSHORTSTR),
1141 SPACELEFT(buf, bp));
1142 bp += strlen(buf);
1143 }
1144 if (SmtpPhase != NULL)
1145 {
1146 (void) sm_snprintf(bp, SPACELEFT(buf, bp),
1147 " during %s", SmtpPhase);
1148 }
1149 return buf;
1150
1151 case EHOSTDOWN:
1152 if (CurHostName == NULL)
1153 break;
1154 (void) sm_snprintf(buf, sizeof(buf), "Host %s is down",
1155 shortenstring(CurHostName, MAXSHORTSTR));
1156 return buf;
1157
1158 case ECONNREFUSED:
1159 if (CurHostName == NULL)
1160 break;
1161 (void) sm_strlcpyn(buf, sizeof(buf), 2, "Connection refused by ",
1162 shortenstring(CurHostName, MAXSHORTSTR));
1163 return buf;
1164
1165 #if NAMED_BIND
1166 case HOST_NOT_FOUND + E_DNSBASE:
1167 dnsmsg = "host not found";
1168 break;
1169
1170 case TRY_AGAIN + E_DNSBASE:
1171 dnsmsg = "host name lookup failure";
1172 break;
1173
1174 case NO_RECOVERY + E_DNSBASE:
1175 dnsmsg = "non-recoverable error";
1176 break;
1177
1178 case NO_DATA + E_DNSBASE:
1179 dnsmsg = "no data known";
1180 break;
1181 #endif /* NAMED_BIND */
1182
1183 case EPERM:
1184 /* SunOS gives "Not owner" -- this is the POSIX message */
1185 return "Operation not permitted";
1186
1187 /*
1188 ** Error messages used internally in sendmail.
1189 */
1190
1191 case E_SM_OPENTIMEOUT:
1192 return "Timeout on file open";
1193
1194 case E_SM_NOSLINK:
1195 return "Symbolic links not allowed";
1196
1197 case E_SM_NOHLINK:
1198 return "Hard links not allowed";
1199
1200 case E_SM_REGONLY:
1201 return "Regular files only";
1202
1203 case E_SM_ISEXEC:
1204 return "Executable files not allowed";
1205
1206 case E_SM_WWDIR:
1207 return "World writable directory";
1208
1209 case E_SM_GWDIR:
1210 return "Group writable directory";
1211
1212 case E_SM_FILECHANGE:
1213 return "File changed after open";
1214
1215 case E_SM_WWFILE:
1216 return "World writable file";
1217
1218 case E_SM_GWFILE:
1219 return "Group writable file";
1220
1221 case E_SM_GRFILE:
1222 return "Group readable file";
1223
1224 case E_SM_WRFILE:
1225 return "World readable file";
1226 }
1227
1228 if (dnsmsg != NULL)
1229 {
1230 bp = buf;
1231 bp += sm_strlcpy(bp, "Name server: ", sizeof(buf));
1232 if (CurHostName != NULL)
1233 {
1234 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2,
1235 shortenstring(CurHostName, MAXSHORTSTR), ": ");
1236 bp += strlen(bp);
1237 }
1238 (void) sm_strlcpy(bp, dnsmsg, SPACELEFT(buf, bp));
1239 return buf;
1240 }
1241
1242 #if LDAPMAP
1243 if (errnum >= E_LDAPBASE - E_LDAP_SHIM)
1244 return ldap_err2string(errnum - E_LDAPBASE);
1245 #endif /* LDAPMAP */
1246
1247 #if HASSTRERROR
1248 err = strerror(errnum);
1249 if (err == NULL)
1250 {
1251 (void) sm_snprintf(buf, sizeof(buf), "Error %d", errnum);
1252 return buf;
1253 }
1254 return err;
1255 #else /* HASSTRERROR */
1256 if (errnum > 0 && errnum < sys_nerr)
1257 return sys_errlist[errnum];
1258
1259 (void) sm_snprintf(buf, sizeof(buf), "Error %d", errnum);
1260 return buf;
1261 #endif /* HASSTRERROR */
1262 }
1263